Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS 5442 (1992): Classification of haematite iron ore [MTD 13: Ores and Raw Materials]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 Indian Standard HAEMATITEIRON ORE-CLASSIFICATION ( Second Revision ) UDC 622*341* BIS 1992 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI December 1992 Price Group 1

5 Ores and Raw Materials Sectional Committee, MTD 13 FOREWORD This Indian Standard ( Second Revision ) was adopted by thebureau of Indian Standards, after the draft finalized by the Ores and Raw Materials Sectional Committee had been approved by the Metallurgical Engineering Division Council. This standard was first published in 1969 and revised in 1982 in the light of the existing availability of haematite iron ore in the country during that period, and future demands in the domestic as well as export markets projected then. In this revision, keeping in view the gaps generated during these years, the classification on the mineralogical composition of the haematitic ores have been resolved into the twin parameters of major chemical composition and particle size of the product. Mineral spectrum in aggregate, lithological nature and alkali load of the iron ores have also been considered. The permissible percentage of fines has not been specified in this standard since it is likely to vary depending upon tire size of the marketed ore, handling machinery in use and should, therefore, form a part of the contract. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 Rules for rounding off numerical values ( revised ). The number of significant places retained in the rounded off values should be same as that of the specified value in this standard.

6 Indian Standard IS 5442 : 1992 HAEMATITE IRON ORE-CLASSIFICATION ( Second Revision ) 1 SCOPE 1.1 This standard covers classification of haematife iron ore on the basis of composite mineralogy. 1.2 The standard is based only upon the main chemistry and the physical size of the end product. It envisages that any geological prototype of the material is to be graded only at the marketing stage, for inducting a homogenous classification irrespective of any intrinsic irregularity of the naturally occurring material before the onset of mining and processing. 2 REFERENCES The following Indian Standards are necessary adjuncts to this standard: IS No.. Title 460 Test sieves: Part 2 Perforated ( Part 2 ) : 1985 plate test sieves (first revision ) 460 ( Part 3) : : : : p93 ( Part 1 ) : : GENERAL Test sieves: Part 3 Methods of examination of apertures of test sieves ( third revision ) General requirements for the supply of metallurgical material (first revision ) Methods of sampling iron ores (first revision ) Methods of chemical of iron ores analysis Determination of common constituents ( jrst revision ) Methods for determining particle size distribution of iron ore fines 3.1 Mineral Associates of Haematite The relative predominance of the minerals associated with Haematite Ore are: Haematite ( Alpha-Fe,Os ) : 55 to 95 percent Maghemite (Gamma-FeaOs) : 0.5 to 5 percent Magnetite ( Fe0.Fe103 ) : 1.5 to 15 percent Martite ( FezOg pseudo- : 0.5 to 1.5 percent morph over Fe304 ) Goethite ( Alpha-FeO.OH Lepidocrocite ( Gamma-FeO.OH ) Carbonate/sulphide/ silicate of iron 3.2 Gangue Minerals ) : 5 to 15 percent : 1 to 5 percent : 0.15 percent, Max The significant gangue minerals in haematite iron ore are: Constitutent Percent Silica ( as SiO, and aluminosilicate ) O-1 to 15 Alumina ( as A1,03 and aluminosili- O-1 to 15 cate ) Titania 0.1 to 0.3 Phosphorus 0.10, Max Alkali ( NarO+K,O) 0.10, Max Basemetals ( Cu+Ca ) O-05, Max 3.3 Natural Modes of Haematite Iron Ore The natural co-existence of all the ore and gangue minerals with varying nature of cohesion, grain and cement relations and synchronous crystallisation, produce the following variety of natural modes in the haematitic iron ore deposits: a) Lumpy ore on upper horizon comprising hard ore, b) Friable ore at lower horizon inclusive of powdery ore, c) Lateritic iron ore, d) Siliceous iron ore, and e) Canga or recemented ore. 4 SUPPLY OF MATERIALS General requirements relating to the supply of haematitic iron ores shall be laid down as per IS 1387 : GRADE DESIGNATION Haematite iron ores shall be of 9 chemical grades designated as: 69 and above, , 63165, 61163, 59161, 57159, and below 55 ( down to 50 percent Fe ); depending on the iron content of the ore ( see Table 1 ).

7 IS 5442 : 1992 Table 1 Classification of Haematite Ore Depending Upon Its Chemical Composition ( Clauses 5 and ) Grade 69 and above Below 55 c--- -_---- Chemical Composition h--_-_ _7 Fe A1203fSi01, C ~-_ MU 69 0 or more 2 Less than 69 0 Up to and including Less than 67 0 Up to and including Less than 65 0 Up to and including 63 0 G Less than 63 0 Up to and including Less than 61 0 Up to and including Less than 59 0 Up to and including Less than 57 0 Up to and including Less than 55 0 Usually up to NOTES 1 P percent Max, S = 0 03 percent nfax, TiOa = 0 25 percent hfnx, for all grades. 2 Other metals excluding Mn, Mg and Ca shall not exceed 0 15 percent. Cu = 0 05 percent -Ilax, and ( Nag0 + KzO ) = 0 10 Max. 6 CLASSIFICATION REQUIREMENTS edition of IS : 1493 for chemical analysis shall be Referee Method. 6.1 For the purpose of this standard, or containing less than 7 percent Fe0 shall be classified as haem$ite iron ore. Determination of Fe0 content shall be done in accordance with IS 1493 : 1959 and IS 1493 (Part 1 ) : The general ranges for silica + alumina shall be between 2 and 15 percent ( see Table 1 ) Particle Size 6.2 The loss on ignition ( LO1 ) of these ores Generally the haematite iron ore shall shall be not more than 8 percent, when determi- be classified in the following sizes when the ned in accordance with IS 1493 : 1959 and IS sieve analysis of the ore is determined in accord ( Part 1 ) : ance with IS 1405 : 1982 and IS : Depending upon the chemical composition and size the haematite iron ore shall be classified as given under and Chemical Composition Depending upon its chemical composition haematite ore shall be classified into 9 grades as shown in Table The chemical composition shall be determined either by the methods specified in IS 1493 : 1959 and IS 1493 ( Part 1 ) : 1981 or any other established instrumental/chemical method. In case of dispute the procedure in the latest Type size, mm Lumps Fines The implication of size shall be of one dimension of each fragment to qualify or dlqualify on the screen. The study on common rock fragment characteristics visualises the shape of the pieces in cube forms rather than cuboid forms. 7 SAMPLING Representative samples shall be drawn aocording to the procedures laid down in IS 1405 : 1982.

8 Standard Mark The use of the Standard Mark is governed by the provisions of tpie Bureau of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards#

9 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyrighl BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Direcror ( Publications ), BIS. Revision of Indian Standards Indian Standards are reviewed periodically and revised, when necessary and amendments, if any, are issued from time to time. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition. Comments on this Indian Standard may be sent to BIS giving the fo Bowing reference: Dot : No. MTD 13 ( Amendments Issued Since Publication Amend No. Date of lssue Text Affected BUREAU OF INDIAN STANDARDS Headquarters; Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi Telephones I Regional Offices : Telegrams : Manaksanstha ( Common to all offices ) Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI Eastern : 1 14 C. I. T. Scheme VII M, V. I. P. Road, Maniktola d ALCUTTA t { , , Northern : SC , Sector 35-C, CHANDIGARH , I Southern : C. I. T. Campus, IV Cross Road, MADRAS , , Western t Manakalaya, E9 MIDC, Marol, Andheri ( East ) , BOMBAY , Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. PATNA. THIRUVANANTHAPURAM. hntcd at New India Printinl Press. Khur~a. lndla